標題: | Realization of transmission zeros in combline filters using an auxiliary inductively coupled ground plane |
作者: | Tang, CW Lin, YC Chang, CY 電信工程研究所 Institute of Communications Engineering |
關鍵字: | chip-type component;filter;low-temperature co-fired ceramic (LTCC);multilayer ceramic (MLC) |
公開日期: | 1-十月-2003 |
摘要: | The out-band transmission zeros of the multilayer low-temperature co-fired ceramic bandpass filter are studied in this paper. The design target of this filter, with the passband between 2.3-2.65 GHz (the true application is 2.4-2.483 GHz), is to reject the local oscillator and image signals and, in the mean time, to suppress the harmonic frequency. This filter is a modified three-pole combline filter, which can easily achieve a high rejection rate and low insertion loss. The source-load coupling capacitor incorporation with cross-coupling grounding inductors can generate three transmission zeros. By properly adjusting the inductance values of the inductors between three resonators and ground can easily manipulate the transmission zero at a high-side skirt to suppress the harmonic frequency. The measured results match well with the electromagnetic simulation that evidences the feasibility of the proposed design. |
URI: | http://dx.doi.org/10.1109/TMTT.2003.817447 http://hdl.handle.net/11536/27475 |
ISSN: | 0018-9480 |
DOI: | 10.1109/TMTT.2003.817447 |
期刊: | IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES |
Volume: | 51 |
Issue: | 10 |
起始頁: | 2112 |
結束頁: | 2118 |
顯示於類別: | 期刊論文 |